Hot vent
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Tuned
Joined: Jul 2004
Posts: 275
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Hot vent
I recently bought a new left over 05 F350 6.0 Utility and I noticed that when I use the vent possition on the HVHC in the cold possition it seems pretty hot. Every other vehicle I have owned has never been this hot. Anyone else have something like this?
Elder User
Joined: Apr 2004
Posts: 890
Likes: 1
From: Douglas County, GA
Is this after you have driven the truck, shut the enfine off for a few minutes, then restarted it? If so, this is common. Others have complained about the same thing on here. I don't remember the exact details about why it is happening, but has something to do with the location of the fresh air intake vent. After the truck has been ran, then sits for a few minutes, the air is warm when you restart the truck. I've noticed I have to drive several miles before it cools back down.
Last edited by F250tuff; Dec 26, 2006 at 10:18 AM.
Freshman User
Joined: Jul 2006
Posts: 35
Likes: 0
From: Severn, MD
I also have this problem/feature. The vent never seems to get cool air even when driving. However, I do get cool air when I put the switch setting so that it blows air out of the vents and from the floor simultaneously and the temp guage set to cool. Not sure why this is but give it a try.
Freshman User
Joined: Aug 2005
Posts: 27
Likes: 0
The coolant runs thru the heater core all the time. Somewhere there is a mod for shutting off the water to the heater core on the web. Basically is to use a valve in the coolant line to the heater core, either vacuum or electric or manually.
Freshman User
Joined: Oct 2006
Posts: 41
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I experienced the same sort of problem last June. I was told by a Ford mech. in Estes Park, Co. that, as stated already, the coolant runs through the heater core all the time. Ford's attempt to get rid of more heat without putting a bigger radiator, fan, or anything else in or on the engine. Sounded logical to me, especially after I stood right there and watched him tinker with the exact same control valve I had messed with already. His tinkering confirmed that it was working properly. I'll pass on his advice to me: If you want cooler air, turn on the A/C.
New User
Joined: Nov 2006
Posts: 5
Likes: 0
From: Lake Havasu City, Az
I took my new “07” into service dept. to investigate hot air w/vent position. I was averaging 30-45 degrees above outside ambient air temp. They said everything checked out normal. I’m having to run the A/C with anything above 60’s
. Should be a real hoot here come summer.
At least with the diesel it should see same MPG A/C on or off.
. Should be a real hoot here come summer.At least with the diesel it should see same MPG A/C on or off.
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Posting Guru
Joined: Jul 2006
Posts: 1,737
Likes: 0
From: Republic of Texas
Try here . . .
You can buy a bipass valve that closes the constant flow to get cool air normally. The auto temp units like my King Ranch come with them. See it here . . .
http://www.dieselsite.com/index.asp?PageAction=VIEWPROD&ProdID=473
http://www.dieselsite.com/index.asp?PageAction=VIEWPROD&ProdID=473
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Senior User
Joined: Feb 2001
Posts: 135
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From: Morgan Hill, CA
Originally Posted by taylorjs
I also have this problem/feature. The vent never seems to get cool air even when driving. However, I do get cool air when I put the switch setting so that it blows air out of the vents and from the floor simultaneously and the temp guage set to cool. Not sure why this is but give it a try.
mike
Elder User
Joined: Feb 2003
Posts: 648
Likes: 1
As well as the coolant running through the core, I think another contributor is that the engines sit so far back in the compartment that the vent ducts become 'heat soaked' after the engine has been running awhile.
I haven't noticed this so much on the 6.0L, because I leave the 'auto' setting on which runs the AC also through the vents to cool things down. My previous '00 V10 Exc. with the prior HVAC strategy was TERRIBLE with this. Not bad when first starting out, but especially when being stopped hot, then starting out again. Made the 'vent' postion useless.
Take Care
I haven't noticed this so much on the 6.0L, because I leave the 'auto' setting on which runs the AC also through the vents to cool things down. My previous '00 V10 Exc. with the prior HVAC strategy was TERRIBLE with this. Not bad when first starting out, but especially when being stopped hot, then starting out again. Made the 'vent' postion useless.
Take Care